High-frequency apparatus



G. F. DU PREL 721,271

HIGH FREQUENCY APPARATUS I July 16, 1929.

Filed Aug. 11, 1925 Fig.2- 4

% I ///l/llllllll Patented July 16, 1929.

UNITED STATES rarer ()FFECE.

GERHARD FREIHEBR DU PEEL, OF MUNICH, GERMANY, ASSIGNOR TO DR. DU PEEL ELEKTROIVIE DIZINISCHE-APPARATE, G. M. B. 1-1., OF MUNICH, GERMANY.

HIGH-FREQUENCY APPARATUS.

Application filed August 11, 1925, Serial No. 49,506, and in Germany August 11, 1924.

This invention relates to Roentgen de vices designed for therapeutical purposes, and particularly to devices of this kind of the portable type, although the essential features of the invention may also be used in Roentgen devices of stationary type.

Devices of this character as heretofore constructed have been heavy and cumbersome and difficult to adjust to suit different exigencies of service in the treatment of patients, and in such devices, because of the arrangement of the parts, as heretofore employed, the conductors are comparatively long and a constant source of danger to patient, operator and apparatus exists from Waste of cur-' the heavily charged wires. rent by dissipation also occurs because of the length of the conductors, and this occurs particularly in certain positions of adjustment of the Roentgen tube. Another decided objection is that of very pronounced sparking of the high tension leads to the tube due to their length-and the impossibility of properly insulating or shielding them. This sparking is accompanied by a rushing and crackling noise and extensive corona light effects and strongozonization of the air, causing fright to timid patients and discomfort to both patient and operator.

One object of my invention is to provide a simple and compact type of apparatus which overcomes these objections and may be readily handled, and allows short leads to be used, and the tube to be easily and conveniently adjusted to suit any condition of service, and which prevents current losses, ozonization, sparking and objectionable noises undesirably affecting the mental poise and physical comfort of the patient and operator.

Another object of the invention is to provide a novel mode of mounting the transformer and tube whereby all these desirable advantages may be attained.

In the accompanying drawing illustrating the invention, 7

Figure 1 is a perspective view of the device.

Figure 2 is a sectional view through the transformer and the transformer and tube supporting shaft or arm.

1* igure 3 is a top plan view of the device.

In carrying my invention into practice I provide an attaching braelset comprising clamping jaws 1 and 2 adjustable by means of a clamping screw 12 and engageable with the edge of a table or other like support 11. The jaw 1 carries a split clamping sleeve 5 receiving a standard 4, which is vertically adjustable in the sleeve and is adapted to be clamped in adjusted position by clamping screws 5 on the sleeve. The standard is preferably made of telescopic tubing and comprises the upper and lower telescoped sectional. 4L and 61 adjustable to vary the height of the standard. The lower end of the section 45, which telescopes over the section 1 is provided with a split clamping sleeve 5 contractible and expansible by means of a clamping screw 5, whereby it may be fixed in the desired position on the section 49. The lower end of the section i may be provided with a split sleeve 10, arranged at right angles thereto and contractible and expansible by adjusting screws 10 by means of which the standard may be mounted, when desired, on a horizontal rod or other like fixed support instead of'a table or its equivalent.

Carried by the standard section 4 is a collar 6 which may be fixed thereto, and which is provided with a split clamping sleeve 7 in which is slidably fitted for ad justment a shaft or arm 8 of some good elec- A screw 7" is protric insulating material. vided for clamping this shaft or arm in adjusted position upon the collar. A Tesla transformer 1-1 (coreless transformer) is mounted on the shaft or arm 8 at one side of the standard. This coil is embedded in a sleeve 15 of insulating material which surrounds the shaft or arm concentric therewith, whereby the'coil is secured against disruption and protected from atmospheric influences. At the end of the shaft or arm 8 remote from the standard is mounted the Roentgen tube 13 and the tube pot 9, which are disposed in axial alinement and at right angles to the shaft or arm. 13 is the radiator of the Roentgen tube. Leading to the primary winding of the coil are the low tension wires 16, which extend to the coil through the end of the arm or shaft mounted on the standard and leading from the secondary of the coil are the high tension leads 17 which extend through the end of the arm or shaft remote from the standard. The coil 14. is mounted en arm or shaft 8 proximity to the tube only the he i high tension leads projecting from. its outer end and extending between the same and the tube being exposed. The exposed end of the high tension leads may be covered and shielded from contact with extraneous objects by a protecting cap 18.

From the foregoing it will be seen that the coil is mounted upon a supporting arm in close proximity to the tube, allowing short lead wires to be used, which are completely shielded, the shortness of these wires preventing current looses, arcing, noises and other affects which reduce the eiiiciency of the apparatus and are liable to cause danger, nervousness and physical discomfort to patient and operator. The arm 8 and parts carried thereby may be adjusted to any elevation by adjustment of the standard section P, and the arm 8 may also be adjusted in wardly and outwardly in the sleeve 7 to position the tube a greater or less distance in advance of the standard as occasion may require. The tube may be adjusted on the arm independently of the transformer, and Without disturbing the latter, so that all necessary adjustments may be obtained to suit varying conditions of service. By placing the transformer in close proximity to the tube on an armor shaft constituting the axis of the transformer itself, and extending the conductors through this arm or shaft, a'very simple and compact ,type of organization is provided which allows the parts to be completely shielded against contact with the patient, operator or extraneous objects, and the leads to be so short that the objections incident to the use of long leads, as in the ordinary type of apparatus, are wholly overcome. The simplicity of the apparatus allows the operator to work with great ease and convenience and without danger of shock, and the protection of the leads onables the operator to work and the patient to receive treatment in an absolutely quiet and composed manner. By disconnecting the sections of the standard and the arm from l. A Roentgen device comprising a sup-,

porting standard, an arm of insulating material extending from the standard, a Tesla transformer coaxially mounted on said arm, a Roentgen tube and pot mounted on the arm at its end remote from the standard and placed at right angles to the arm, low tension leads to the transformer extending through the arm, and high tension leads from the transformer to the tube extending through the arm.

2. A Roentgen device comprising a sup porting standard, an arm of insulating material extending from the standard, a sleeve of insulating material concentrically mount ed on said arm, a Tesla transformer car ried by and embedded in said sleeve, a Roentgen tube and pot mounted on the arm at its end remote from the standard and at right angles to the arm, low tension leads to the transformer extending through the arm, and high tension leads from the transformer to the tubeextending through the arm.

In testimony whereof I affix my signature.

DR. GERHARD FRHR. DU PEEL. 

